Aerodynamic vibration mechanism of HDD arms predicted by unsteady numerical simulations
Aerodynamic vibration mechanism of HDD arms predicted by unsteady numerical simulations
复制标题
非定常数值模拟预测HDD臂的气动振动机制
DOI：
10.1109/tmag.2002.801866
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
T. Maruyama
中科院分区：
文献类型：
--
作者：
H. Kubotera;N. Tsuda;M. Tatewaki;T. Maruyama
随着记录密度的增加和更高的旋转速度，硬盘驱动器（HDD）的空气动力学方面现在非常重要。采用直接数值模拟的方法研究了硬盘内部的气流流动。我们模拟了两种情况：第一个有一个没有减重孔的手臂（无孔情况），而第二个有一个有减重孔的手臂（有孔情况）。我们观察到周期性的旋涡（卡门型），其频率约为4 kHz的下游的臂在这两种情况下。有孔情况下涡的尺度比无孔情况下大。在孔的情况下，手臂扭矩的频谱有尖锐的峰值，这将直接影响头部定位精度。此外，我们发现在无孔情况下没有显著的峰。
With increases in recording density and higher rotation speeds, the aerodynamic aspect of hard disk drives (HDDs) is now quite significant. We studied the internal airflow of HDDs using a direct numerical simulation. We simulated two cases: the first had an arm with no weight-saving hole (no-hole case), while the second had an arm with a weight-saving hole (hole case). We observed periodic vortices (Karman type) for which the frequency was about 4 kHz in the downstream of the arm in both cases. The scale of the vortex in the hole case was larger than that in the no-hole case. In the hole case, the spectrum of the arm torque had sharp peaks that would directly affect the head positioning accuracy. Moreover, we found that there was no remarkable peak in the no-hole case.